What Breaks From 1k to 1M Requests Per Second
Post · Sep 17, 2026
The same endpoint, run through four traffic tiers. At 1k req/s almost any design survives. At 10k the database and the single instance give first. At 100k the cache and the load balancer become the systems under test. At 1M the architecture itself has to change, because the failure mode is no longer capacity, it's correlated behavior across clients you don't control.